diff --git a/CHANGES.rst b/CHANGES.rst
index 5a66191ed..a92d20429 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,15 @@
 Changelog
 =========
 
+Version 9.1.0
+~~~~~~~~~~~~~
+
+Bug fix release and minor enhancements:
+We have corrected spelling mistakes
+
+All changes:
+https://github.com/Open-MSS/MSS/milestone/105?closed=1
+
 Version 9.0.0
 ~~~~~~~~~~~~~
 
@@ -10,7 +19,8 @@ In this way, a user can authenticate themselves in one system and gain access to
 by providing proof of authentication. In our documentation in the Components section you find a detailed description.
 
 Matthias Riße refactored the test suite and optimized and accelerated our CI test runs.
-All tests run in parallel now and are not retried upon failure, and most tests are also executed in a randomized order, instilling more confidence in the results.
+All tests run in parallel now and are not retried upon failure, and most tests are also executed in a randomized order,
+instilling more confidence in the results.
 Quite a bit of duplicated code was unified, mostly using pytest fixtures.
 Additionally, CI test runs now also happen on x86_64- and ARM-based macOS.
 
@@ -24,7 +34,7 @@ HINT:
 The syntax of the server configuration of MSColab and MSWMS has changed. We removed the class definition.
 For MSColab we have added new configuration options related to SAML2.
 The change on the MSColab server also required changes on the MSUI handling the MSColab login. These changes are
-not backwards compatible. Server and Client must use versions >=9.0.0.
+not backwards compatible. MSColab Server and MSUI Client must use versions >=9.0.0.
 We introduced a MSCOLAB_auth_user_name in the users configuration which simplifies the login process.
 
 All changes:
@@ -153,7 +163,7 @@ Mscolab Operations in use for more than 30 days, move to an inactive list.
 The initial idea for multiple flightpaths on topview stems from bkirbus.
 GSoC mentors were Reimar Bauer, Jörn Ungermann, Sonja Gisinger
 
-With MSS 9.0.0 we base our installation on miniforge. This has
+With MSS 8.0.0 we base our installation on miniforge. This has
 mamba in the base environment. Mambaforge is discouraged of September 2023.
 
 All changes:
diff --git a/mslib/version.py b/mslib/version.py
index 934844e40..a179012a9 100644
--- a/mslib/version.py
+++ b/mslib/version.py
@@ -24,4 +24,4 @@
     See the License for the specific language governing permissions and
     limitations under the License.
 """
-__version__ = u'9.0.0'
+__version__ = u'9.1.0'